Only log when running locally

While I presume there's some kind of logging we might value in production, the logging effect
written here is just for local development since production objects get "mangled" by advanced
compilation, thus becoming useless.

src/software/justenough/itsallgravie/utils.cljs

@@ -9,7 +9,8 @@
 (rf/reg-fx
  ::log
  (fn [value]
-   (js/console.log value)))
+   (when goog.DEBUG
+     (js/console.log value))))
 
 (rf/reg-cofx
  ::server-hostname